We've built a box robot chassis that could easily be extended with attachments for FIRST Technical Challenge competition.

If you ever filled that FIRST Technical Challenge is difficult and you don't know where to start from, building this Tetrix robot is the first thing that you could do. You would have 4 motors, plenty of space for attachments and good access to the phone.

The robot is built from a Tetrix Set without additional parts. It's a winning robot in just 107 steps